Heater



E1 B. CLEWORTH.

HEATER.

APPLICATION FILED APR. I9, 1919.

1,338,855. Patentedmy 4,1920.

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NTED STATES PATENT OFFICE.'

ERNEST B. CLEWORTH, F ST. PAUL, MINNESOTA.

HEATER.

Lacasse.

Application led April 19, 1919.

Z'o cid yzi/wm. t may concern.'

Be it known that I, ERNEST B. CLnwoR'rH, a citizen of the United States,residing at St. Paul, in the county of Ramsey and State of Minnesota,have invented certain new and useful Improvements in Heaters; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to stoves and furnaces herein designatedgenerically as heaters, and more particularly for those designed for theburning of coal, and provides therein an auxiliary air intake tube ofthe type sometimes designated as over fire air conduits. These over fireair'conduits have usually been arranged to deliver through the fuel doorbut sometimes have been brought up through the body of burning coal.

My invention particularly improves this latter type of auxiliarly airsupply device.

The invention is illustrated in the accompanying drawings wherein likecharacters indicate like parts throughout the several views. Referringto the drawings,

Figure 1 is a vertical section with some parts broken away, illustratingmy invention as applied to a furnace of the hot water or steam heatertype;

Fig. 2 is a plan view of the nozzle section. of the auxiliary air intaketube;

Fig. 2E is a section on the line 3MB of ig. 2;

Fig. 4 is a front elevation of the said nozzle;

Fig. 5 is a front end elevation of the auxiliary air intake tube and thedevice for op" erating the deilector which is applied to the nozzle;

Fig. 6 is a plan view of the nozzle deflector;

Fig. 6; and

Fig. 8 is a front elevation of the said deflector.

Of the parts of the heater, to wit, as shown, the hot water heater orfurnace, the numeral 9 indicates the shell or body thereof, the samehaving the usual fuel door pas- 10 with fuel door 11. Just above the 7is a section on the line 7 -7 of Fig.

grate bars 12 the shell 9 is provided with the customary clinker dooropening 13 adapted to be closed by the customary door 14. The

Specification of Letters Patent.

rateuteunay l, 192e.

Serial No. 291,207.

numeral 15 indicates the ash pit door which will usually be equippedwith the customary damper 16.

In Fig. 1, the dotted line y indicates the approximate fuel level. Inaccordance with my invention, I provide an approximately L-shapedauxiliary air intake tube 17, the horizontal portion of which overliesthe grate bars 12 with its outer end projecting into and nearly throughthe clinker door opening 13. The upright portion of this tube 17 extendsto a point above the fuel level y and terminates in a socket 17il inwhich the downturned end of an elbow-like tubular nozzle 18 is swiveledfor rotation on a vertical axis.

The tube 17 is preferably of cast iron and its lower rear wall is madevery thick or flanged so as to prevent the tube from being warped by it.In the back of its upper portion it is shown as provided with asupporting screw 19 that bears against the rear wall of the shell 9 andis adjustable to set the upright portion of Hw tube in a verticalposition spaced from the walls of the shell 9. Other suitable devicesdesired may be used to hold the tube 17 in position.

At its inwardly projected upper end, the nonzle 18 is provided withlaterally projecting arms 2O to which a dellector blade 21 is pivoted at22. The deflector blade 21, on its top has laterally spaced beveled lugs23 that not only serve as weights, but perform a more importantfunction, to wit, they defleet the air laterally and spread the sameabove the deflector blade when the latter is lowered. Also, the blade 21is formed with depending side flanges 21a that are beveled at theirlower edges (see Fig. 7 so that they will lap and form close joints withthe beveled upper edges of the arms 20. At its pivoted outer end, saiddellector blade 21 is provided with a short depending arm 24 to whichthe upper end of a small wire cable or chain 25 is attached. This cable25 is extended down through the nozzle 17. having frictional contactwith the inner wall thereof, and down through the upright portion of thetube 17 and is attached at its lower end to a windlass rod 26, whichrod, at its inner end, is pivoted in the elbow of the tube 17, and atits outervend is pivoted in a bar 27 the ends of which are attached to alatch ring 2S rigidly secured in the outer end of the tube 17.

The Windlass rod 26 is capable of both rotation and a slight endwisemovement and at its outer end it is provided with a latch lever 29, theend 'of which is engageable with any of several circumferentially spacednotches 28 of said ring 28. A coiled spring 30 surrounds the rod 26,reacts against the bar 27 and against a collar 31 on said rod 26 andpresses the said rod inward so to normally maintain engagement betweenthe lever 29 and the engaged notch of the latch ring 28.

A As is evident, by rotation of the windlass shaft 26, acting throughthe cable 25, the nozzle deflector plate 21 may be adjusted on its pivot22 and thereby set in any of several different positions and theresecured by the latch lever 29.

In the extreme uppermost position of the deflector plate 21 shown inFig. 1, all of the air drawn in through the air tube 17 and nozzle 18will be deflected downward directly onto the fire. This is desirable insome conditions of the burning fuel, but in other conditions, it isadvisable to deliver a portion of the air horizontally. Obviously, whenthe deflector plate 21 is lowered, an opening will be afforded betweenthe free edge of said blade and the upper portion of the nozzle 1S sothat more or less air, depending on the adjustment of the deflectingplate, will pass directly downward. By the use of a poker, the nozzleportion of the auxiliary air intake device may be moved from one side tothe other or set at the center of the fire pot, as may be required toproduce the best results. The air in passing through the tube 17 andnozzle 18, will of course, be preheated to a high degree so that it willvery greatly increase the combustion as soon as it comes into Contactwith the burning fuel, and will thereby insure burning up of all of thegases and carbon so that there will be no resulting smoke from thecombustion. Of course, for supplying air to the air tube 17, either theclinker door must be opened or the damper which is usually providedtherefor must be opened, but when it is desired to cut off thisauxiliary supply of air the said door and itsv auxiliary air intake tubeextended inward. y

and thence upward through the fire pot thereof, a nozzle swiveled to theupper end of said air tube and adapted to swing laterally above thefuel, and a deflector blade pivoted to said nozzle.

3. The combination with a heater, of an auxiliary air intake tubeextended inward and thence upward through the fire pot thereof, a nozzleswiveled to the upper end of said air tube and adapted to swinglaterally above the fuel, a deflector blade pivoted to said nozzle, andmeans for adjusting said deflector blade including connections extendeddownward through said air tube.

e. The combination with a heater, of an auxiliary air intake tubeextended inward and thence upward through the fire pot thereof, a nozzleswiveled to the upper end of said air tube and adapted to swinglaterally above the fuel, a deflector blade pivoted to said nozzle, andmeans for adjusting said deflector blade, a crank comprising a windlassshaft extended through the inleading portion of said tube, and a cableattached to the inner end of said windlass shaft and extended upward land connected to said deflector blade.

5. The combination with a heater, of an auxiliary air intake tubeextended inward and thence upward through the fire pot thereof, a nozzleswiveled to the upper end of said air tube and adapted to swinglaterally above the fuel, a deflector blade pivoted to said nozzle, andmeans for adjusting said deflector blade comprising a windlass shaftextended through the inleading portion of said tube, and a cableattached to the inner end of said windlass shaft and extended upward andconnected to said defiector blade, the said windlass shaft having alatch and being capable of limited endwise movement to operate saidratchet.

6. Thecombination with a heater, of an auxiliary air intake tube leadinginto the fire pot and having a nozzle located above the fuel, saidnozzle having a pivoted deflecting blade, said deflecting blade having alaterally beveled deflecting lug for spreading the air.

7. The combination with a heater, of an auxiliary air intake tubeleading into the lire pot and having a nozzle located above the fuel,said nozzle having a pivoted deflecting blade, the said deflecting bladeon its upper surface having laterally spaced slightly beveled deflectinglugs for spreading the air.

In testimony whereof I affix my signature in presence of two witnesses.

ERNEST B. CLEWORTH. Witnesses:

BERNICE G. BAUMANN, HARRY D. KILGORE. l

